Improved stone-cutting machine



attent @ffice gleiten taten DAVIDYH. MERRIAM, OF FITGHBURG, MASSACHUSETTS.

.Leners 'Patent No. 81,522, aaien Auges 25, 1868.1

IMPROVE STONE-CUTTING MACHINE..

y '.ro ALL WHoM Im MAY' coNonRN= construction, and operation.

Be it known that I, DAVID H. MERRIAM, et' Fitchburg, in the county of Worcester, and State of Massa# c huscttsy-have*invented certain new and useful Improvements in Stone-Cutting Machines; and I do hereby declare that the following is a full and exact description thereof, reference being hadvto'thc accompanying drawings, and to the lettersr of reference marked thereon. l

Tp enable others skilled in the'art to make and use my invention, I will proceed to 'describe its nature,

The nature of my invention consists in arranging a series of cutters upon a hollow revolving cylinder, and providing said cylinder with small perforations, opening near each cutter, and also with a stuing-boxzand pipe, through which hot or. cold water, or steam, may tlow into the revolving-cutter cylinder, and thence, through the small'pcrforationsabove mentioned, upon the stone which-is being worked.

Figure lris a. perspective view of the entire machine. Y.

f FigureI 2'is'a plan, part of the table being removed to show the device for moving the table back and forth Figure 3 shows the cutting-cylinder-in elevation, and the stuffing-box and pipe in section.

Figure 4`is an end elevation of the machine. Y

Figure 5 shows one form of a cutting-cylinder as it' would he made for cutting an irregular surface.

The table C, and bed-piece and ways A B B, figs. 1 and 2, are made in a manner similar to the like parts `ot"1:nachinesh op planers for heavy iron-work. Y The actuating-gear is or maybe also like'that used in an ordinary planer; therefore' these parts do not require a particular description.

In fig. .2, L is a cone-pulley, attached to theshat't O, and aetuates all of the gear which serves to' movethe table C back and forth. `V is a shaft, located immediately under .thc table C, and having upon it the screwthread P", which meshes into a corresponding thread made inthe under side ot' the table C. V has also upon it the loose pinion P, and the loose screw-pinion Pi; a1so,'a sleeve, S, which is free to slide back and forth on the shaft V, but is so connected with a spline that it cannot be revolved Iunless the shaft V', and consequently the screw P", also revolves. l

Q is a lever, moved by the rod ltand handle It', which serves to slide the sleeve S against the pinion P or Pi, as-Inay be desired. i The sleeve SA has at either end small notches, which may serve to mesh into similar' notches en P4 or P, so that ifit is pushed against the'pinion P, then V and P" will be revolved, and the table will be carried backward rapidlyghut it'v S is moved up against the screw-pinion'I, V and P will be'revolvcd in thc opposite direction very slowly, thus advancing the table slowly, but with great power, forward;

4 In actual practice, I do`not proposcto confinemyselt tothis mode of actuating the table, as there are many ways in which itnnay be donc equal-lyiiweil. r` i I i My cutter-cylinder D, figs.`.l and 4, is attached to the head-.posts G G. by thc sliding blocks or boxes E E',

which may be made to traverse up and'do'wn by means of the screws H H. Thesescrcws H H are operated by the crank, K', the shaft K, and pinidns H II". The. cutter D is made to revolve'l by the band-pulley D', the y pulley D being an idler. f

The euttcrecylindei-QD may be madein the form represented in igs.'1, 3, and 4, or may be made as represented in iig. 5, or,in fact, in such form as may be necessary to do the desired kind of work. The surface of this cylinder is thickly studded with cutting-peints, d el (l, fig. 4, made of diamonds, steel, or any suitable material. Near cach of these cutting-points, small perforations, n n n n, are made, reaching into `the chamber y within the cutter-cylinder D, this chamber being supplied .with hot or cold water, or steam under pressure, by

the pipe M and hollow .stuffing-box- T, so that, when the machine is in operation, jets of water or steam are thrown uponthc stone being worked, thus serving,r to'kecpthe cutters and the stone wet, and to clear away the chips and dust.

M, iig. 3, is a. supply-pipe, being provided with :in ordinary globe-valve, N, which connects with the cutter l in the cutter-cylinder D by means of the stuHing-box T T T. i

In case hot water or steam is used, the pipeM may lead directly to the boiler; fon oold water, it may conneet with an elevated tank. i l

What I claim as my invention, and desire to secure by Letters Patent of the United Sta-tes, is- The cutter-lcylnder, provided with cutters and apertures, :md supplied with water or steam, for dressing stone or other material, substantially as described.

- D. H. MERRIAM.

Witnesses:

WILLIAM EDsoN, A. HUN BERRY. 

